Lew Shannon, K0RR,
lshannon@uh2309p02.daytonoh.ATTGIS.COM is pushing the edge of packet radio networking. He has
a 2mbs high speed packet link working over a 1/2 mile path on
910mhz between W8PLQ and himself. They are using wireless LAN (AT&T's Wavlan)
cards at 250mw using spread spectrum technology. He found it necessary to
put a 33ele loop yagi with hardline up at about 45ft in an attempt to get
over the trees.

They are getting a measured 98% packet reliability rate over the
link. They are using the standard packet driver that comes with the WavLan
cards. His JNOS 1.10i system serves as the router and bridge to the Ohio
19.2kb UHF packet network.

The 386/20 system has an Ethernet adapter which is linked to his Win95
486/66. The differences in throughput over the WavLan link and Ethernet are
hardly noticeable when moving large files via FTP (it's FAST).

This was a low budget operation with hardline scrounged from a local cable
company that was doing large scale conversion to fiber. The real deal was
getting access to some early beta versions of the WavLan cards that were no
longer needed. It's amazing what you can do when the price is right!

On Part 15 Devices WWW Page by Lee Fry, AA0JP, you can find links to information about Part 15 Wireless LAN (WLAN) and consumer devices that may be of use to amateur radio experimenters. The focus is on part 15 devices at the chip, board, or box level.

Regulations

Organizations

The Wireless Opportunities Coalition
is a diverse group of organizations and companies dedicated to
preserving and expanding the opportunities for growth in the wireless
industry. The Coalition's primary focus is to support the development,
manufacture, and use of wireless communications and related devices
which are not licensed by the Federal Communications Commission
(FCC) but are regulated under "Part 15" of the FCC's
rules. Many of these devices share the 902-928 MHz frequency band.

Cabletron Systems has teamed up with
Windata, Inc., a leading developer of wireless information networks, to
expand its wireless networking solutions with the introduction of the
AirPort Series, a wireless interbuilding ethernet system.

Cylink Corporation
is the maker of Airlink, a spread spectrum wireless modem. Here
is a short Why Spread Spectrum ?
page that introduces the Airlink product. There is even price
information to give you a feel for the cost of these devices.

Viterbi, Andrew J. (1991). Wireless Digital Communication: A View Based on Three Lessons Learned. IEEE Communications Magazine, September 1991. Reprinted in Multiple Access Communications: Foundations for Emerging
Technologies, Norman Abramson, editor. IEEE order no PC0287-3. An excellent paper by Dr. Viterbi currently with QUALCOMM, Inc in San Diego, CA. This page is been provided by Phil Karn, KA9Q.

Thesis

Smith, Darryl, VK2TDS. (1995) A Spread Spectrum Packet Radio Network Report submitted in Partial Fulfilment of the Requirements for the Degree of Bachelor of Engineering (UTS) in Electrical Engineering. Academic Supervisor: A/Prof. Sam Reisenfeld. UNIVERSITY OF TECHNOLOGY SYDNEY, SCHOOL OF ELECTRICAL ENGINEERING

Chronology of Amateur Publications

The following citations chronical spread spectrum related articles in Amateur Radio pubilications --
QST, QEX, the AMRAD Newsletter, 73 Amateur Radio Today, CQ, and Ham Radio.
Many of these articles are reprinted in The ARRL Spread Spectrum Sourcebook. These articles are indicated by
the symbol. The book is available from the American Radio Relay League,
225 Main Street, Newington, CT 06111.

1990

1991

1992

1993

1994

1995

Journal Articles

The following citations are spread spectrum related journal
articles. Several of the articles below are reprinted in Multiple Access
Communications -- Foundations for Emerging Technologies, edited by
Norman Abramson and published by the IEEE
Press. These articles are indicated by the symbol.

This is by no means an exhaustive list. If you feel that
a paper should be added or deleted, please contact the author at N7HPR
(www).

Raymond W. Nettleton and George R. Cooper, "Error
Performance of a Spread-Spectrum mobile Communications System in a Rapidly-Fading
Environement," Conference Record of National Telecommunications
Conference, Los Angeles, California, Dec 5-7, 1977.